Mathematics for IGCSE & O level - Equations (Section 6 - No. 38)

If an equation is in the form ax² + bx + c = 0 and you solve it using the quadratic formula, which of the following represents the solution?

x = (-b ± √(b² - 4ac)) / 2a

x = (b ± √(b² - 4ac)) / 2a

x = (-b ± √(b² + 4ac)) / 2a

x = (b ± √(b² + 4ac)) / 2a

The quadratic formula is: x = (-b ± √(b² - 4ac)) / 2a